Detailed Product Description ful coverage disconnect tool set, car repairing tool Works on quick connect fuel lines on Ford,GM,and Chrysler,and onthe spring lock fuel line couplings on Ford's popular PFI system.They won't damage fuel linesFalse False Bitmap or fuel line connectors.Works on 5/16",3/8"and 1/2"fule lines.Vehiclemanufacturer approved andwill not damage fittingsbeings disconnected.